Definition of toll. 1  transitive verb. 2  1 : to sound (a bell) by pulling the rope. 3  2a : to give signal or announcement of the clock tolled each hourb : to announce by tolling church bells tolled the death of the bishopc : to call to or from a place or occasion bells tolled the congregation to church.  intransitive verb.
The formula that this water intake calculator uses is that for every pound of body weight you need 0.5 ounces of fluid intake per day. Therefore if your body weight is 200 Pounds, you would need 100 ounces of fluid.
Low end of range = Body weight (lbs) x 0.5 = (ounces of fluid/day) High end of range = Body weight (lbs) x 1.0 = (ounces of fluid/day) For example, if you weigh 150 pounds, your approximate water requirement will be between 75 and 150 ounces each day.